WD Ultrastar DC HC320 8TB 7200 RPM SATA 6Gb/s Enterprise Hard Drive
The Western Digital Ultrastar DC HC320 is an enterprise-class 8TB internal hard drive designed for data centers, storage arrays, and demanding IT workloads. With 7200 RPM performance, 256MB cache, and SATA 6Gb/s interface, this drive delivers sustained transfer rates up to 255 MB/s and a workload rating of up to 550TB per year, making it ideal for traditional storage, server applications, and distributed computing environments.
Enterprise-Class Reliability
Built for 24x7x365 operation, the Ultrastar DC HC320 features up to 2.5 million hours MTBF and is backed by a 5-year limited warranty. This drive employs Conventional Magnetic Recording (CMR) technology in a proven 5-disk air platform, ensuring dependable performance in the most demanding storage environments.
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MTBF: Up to 2.5 million hours
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Workload rating: Up to 550TB per year, 10 times the rating of desktop drives
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Warranty: 5-year limited warranty
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Advanced reliability features: Rotational Vibration Safeguard (RVS) technology, Rebuild Assist for faster RAID rebuilds
Performance & Technology
The DC HC320 is based on a proven 5-disk air platform design using Conventional Magnetic Recording (CMR) in a 3.5-inch large form factor. It features a second-generation dual-stage micro actuator for enhanced head positioning accuracy and better drive performance. The drive also includes flash-based non-volatile cache (NVC) to improve write performance and media cache architecture for enhanced reliability and data integrity during unexpected power loss.
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Interface: SATA 6Gb/s
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Rotational speed: 7200 RPM
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Cache: 256MB
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Sustained transfer rate: Up to 255 MB/s
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Format: 512e (Advanced Format)
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Average latency: 4.16 ms
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Seek time (read): 8.0 ms
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Seek time (write): 8.6 ms
Applications
Designed for traditional storage and server applications as well as distributed and scalable computing environments:
- Data center storage arrays
- Direct Attached Storage (DAS) and Network Attached Storage (NAS)
- RAID arrays
- Block and file storage architectures
- Distributed file systems (e.g., Apache Hadoop) for big data analytics
- Rack-mounted enclosures and servers
What's in the Box
- WD Ultrastar DC HC320 8TB hard drive
Full Specifications
Storage
| Capacity |
8TB |
| Interface |
SATA 6Gb/s |
| Form Factor |
3.5-inch |
| Format |
512e (Advanced Format) |
Performance
| Rotational Speed |
7200 RPM |
| Cache |
256MB |
| Interface Transfer Rate |
600 MB/s |
| Sustained Transfer Rate |
Up to 255 MB/s |
| Average Latency |
4.16 ms |
| Seek Time (Read, Typical) |
8.0 ms |
| Seek Time (Write, Typical) |
8.6 ms |
Reliability
| MTBF |
2.5 million hours |
| Workload Rate |
Up to 550TB per year |
| Warranty |
5 years (limited) |
Physical
| Dimensions (L × W × H) |
147 mm × 101.6 mm × 26.1 mm |
| Weight |
715g (1.58 lbs) |
Environmental
| Operating Temperature |
5°C to 60°C |
| Non-Operating Temperature |
-40°C to 70°C |
Specifications are sourced from the manufacturer product page and may be updated.